Defines the objects required to monitor the ATM PVC OAM
(Operation, Administration, and Maintenance) function.

The OAM functionality may be enabled on one or more ATM PVCs
in a system.  When this functionality is enabled on a given
PVC, the system	will periodically generate OAM F5 end-to-end
loopback cells on the PVC.  The primary goal of this function
is to insure that an ATM PVC is brought down if the loss of
network connectivity to the remote end is detected by the
failure of the F5 OAM heartbeat cell.  In addition, when this
function is enabled on a PVC, receipt of an incoming F5 OAM
VC-AIS (Virtual Circuit - Alarm Indication Signal) cell or
F5 OAM VC-RDI (Virtual Circuit - Remote Detection Indicator)
cell will also cause the associated PVC to be brought down.